Feng Zijian, deputy director of the China Center for Disease Control and Prevention, said that a considerable proportion of COVID-19-infected people do not spread and will not cause second-generation cases; However, a few infected people or patients will spread more than the basic transmission number-more than three, and will spread more than three second-generation cases, which constitutes a phenomenon of hyper-transmission, which is a very important feature of COVID-19.

In the process of epidemic control in various places, it is not surprising to find the phenomenon of super-transmission or super-disseminator.

Feng Zijian said that reducing mass activities is a very important measure to eliminate the phenomenon of super-life.

Extended data:

A "1 to 32" super communication event happened in Jilin.

According to CCTV news reports, from June 5438+ 10/3, 0 1 0 to 05: 00, there were new asymptomatic infected people 13 in Jilin province, all of which were notified on June 5438+ 10/3.

65438+1 October 65438+March Jilin Province Bulletin1Example An asymptomatic infected person imported from Heilongjiang Province was trained and taught in Aishang Han Bang Health Center in Gongzhuling City, Jilin Province and Sheng Yuan Quality Life Workshop in Tonghua City, Jilin Province, and then caused group infection.

According to the official report, at present, the case has infected 32 people in three cities of Jilin Province, distributed in Tonghua City (12 cases), Gongzhuling City (19 cases) and Songyuan City (1 case).